Answer
$I$.
Work Step by Step
Graph $y=1+cos(x)$ can be obtained by shifting $y=cos(x)$ vertically $1$ unit $up$, thus the answer is $I$.
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 6 - The Circular Functions and Their Graphs - 6.4 Translations of the Graphs of the Sine and Cosine Functions - 6.4 Exercises - Page 612: 15
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